Design a search bar with autocomplete for a large marketplace: from typing a character to displaying the suggestions.
~10 min by voice
How to approach it
The interviewer wants to see whether you can design a frontend feature end to end: the network and request races, caching, UI states, accessibility, security and metrics. It's not enough to "slap on a debounce"; you need to show that you see every bottleneck on the path from a keypress to a suggestion appearing.
The interviewer will ask this question and listen. Think out loud and ask for a hint if you need one. When you're done, pause or tap “That's my answer”. In about a minute, your score and the points you covered show up here.